08-04-2018, 11:57 AM
Joe,
Thanks for telling us about the updated Bowditch.
As to Haversins, can't help you much about that for finding the distance between two points. I use this formula for that;
Distance = 90 – Sin -1 (sin(Destination latitude) x sin(Your present latitude) + cos(Destination latitude) x cos(Your
present latitude) x cos(Difference in longitude between Your Location and Destination Location)
Multiply answer by 60 to get Nautical miles.
The "Sin-1" means arc-sin.
A Casio calculator is the only calculator I use- cellular phone one isn't convenient or easy.
Are you trying to find a Great Circle route and waypoints? Pub. No. 229 presents a way to do that.
As to electronics. Ugh, yesterday I was trying to tighten a bolt on the boat trailer hitch and needed the ol' trusty flashlight. Would the batteries work?! Of course not! I was "on the hard" but was a' cussin' like a sailor.
Lou
Thanks for telling us about the updated Bowditch.
As to Haversins, can't help you much about that for finding the distance between two points. I use this formula for that;
Distance = 90 – Sin -1 (sin(Destination latitude) x sin(Your present latitude) + cos(Destination latitude) x cos(Your
present latitude) x cos(Difference in longitude between Your Location and Destination Location)
Multiply answer by 60 to get Nautical miles.
The "Sin-1" means arc-sin.
A Casio calculator is the only calculator I use- cellular phone one isn't convenient or easy.
Are you trying to find a Great Circle route and waypoints? Pub. No. 229 presents a way to do that.
As to electronics. Ugh, yesterday I was trying to tighten a bolt on the boat trailer hitch and needed the ol' trusty flashlight. Would the batteries work?! Of course not! I was "on the hard" but was a' cussin' like a sailor.
Lou